The original God of War 2 game for the PS2 is significantly larger than 200MB. The game requires around 4.7 GB of storage.
Developers often added "padding" data to the original discs to improve read speeds; these are the first things removed in compressed versions. How to Use Compressed PS2 Files 200mb god of war 2 ps2 highly compressed iso ultimo top
The file uses high-level compression algorithms (such as 7-Zip or RAR) to shrink the standard DVD ISO down to the claimed 200MB. This is designed for users with limited bandwidth or data caps, allowing for a significantly faster download time compared to the full 4GB+ original file. The original God of War 2 game for